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April 18, 2014

April 18, 2014

Posted by **Angela** on Thursday, November 10, 2011 at 9:52am.

- algebra -
**dingestifier**, Thursday, November 10, 2011 at 10:12amin fact,this question is to calculate,and not just simplify.

(-19)^2

=19^2

=(10+9)^2

=10^2+2(9)(10)+9^2

=100+180+81

=361

in this question,we can see that there is no need to calculate the answer by using CALCULATOR

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